Wrench.



n. MACKIN.

WRENCH.

APPLICATION FILED .IULY 5'. ISIS.

.Patented Feb. 25, 1919.

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1N VENTOR 1 v/a/"a W W Wa M W ICHARD MACKIN, OF GROVETON, NEW HAMPSHIRE.

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Specification of Letters Patent.

Patented Feb. 25, 1919.

Application 1ed July 5, 1918. Serial No. 243,317.

To all whom t may concern.'

Be it known that I, RroHARD MAGKIN, a citizen of vthe United States, residing at Groveton, in the'county of Coos and State of New I-Iampshire, have invented new and useful Improvements in Wrenches, of which the following is a specification.

The present invention relates to improvementsin the constructionv of wrenches, one object being to provide a wrench wherein the slidable jaw may be quickly moved toward or away from the stationary jaw, to automatically lock the sliding jaw in its adjustedjposition, and to further provide means whereby minute adjustment may be obtained to permit of an article being firmly engaged by the jaws, or to permit the sliding jaw to be moved only a slight distance away from the article to allow the wrench to be brought out of engagement with the said article to retain the jaws in position to e engage with a similar sized article.

Another-.object of the invention is to provide a wrench having its slidable jaw formed with a toothed `angular member which abuts one of the edges of the shank of the stationary 'j aw and which is received in a suitable pocket in the handle of the wrench, to arrange upon the said handle or uponthe shank of the stationary jaw a sliding plate carrying a rotatable, exteriorly threaded, adjusting nut, and to provide one of the ends of said sliding plate with an arched resilient tail which is secured at its end to the handle and which normally forces the adjusting nut into engagement with the toothed member of the movable jaw; said arched resilient member, when contacted, being adapted to move the plate in one direction so as to move the threaded adjusting nut or screw out of engagement with the angular threaded member of the movable jaw to permit of the free and quick adjust ment of the movable jaw toward or away from the stationary jaw.

A still further object of the invention is to simplify and improve the existing art by producing a wrench which is simple in construction, easily and quickly adjusted, cheap to manufacture and which will perform the functionsv for which it is devised with accuracy and with surety. A

With the above and other objects in view, the improvement resides in the construction, combination, and arrangement of parts set ing within the scope of the appended claims.

In the drawing:

Figure 1 is a side elevation of a wrench constructed in accordance with the present invention.

Fig. 2 is a transverse sectional view approximately on the line l2--2 of Fig. 1. Fig. 3 is a horizontal sectional view approximatelyy on the line 3-3 of Fig. 2. Fig. 4 is a sectional view approximately on the line 4--4 of Fig. 1, but illustrating the slidable plate arranged in guideways in the handle, and Fig. 5 is a perspective view of the slidable plate and the resilient tail formed therewith. u

In the drawing` of thewrench the numeral 1 includes a stationary jaw 2 .having an angular shank 3 to which is secured ahandle 4, while mounted, for slidable movement, upon the shank 3 is the movable jaw 5. l

The movable jaw is formed, or otherwise provided, with a right angular extension 6 which rests snugly against one of the edges of the shank 3 and which has its free end received in a suitable depression or pocket? I provided in the handle 4. The outer face of the extension 6 is concaved and is provided with teeth, indicated by the numeral 8 and as seen in Fig. 2 of the drawings.

- .The numeral 9 designates a sliding plate which is provided with an opening 10 corresponding in shape and area with the cross sectional diameter of the shank 3 andthe eX- tension 6 of the jaw 5. The opening 10 is of a sufficient length to permit of the plate 9 being moved any desired distance over the shank 3 of the extension 6 for a purpose which will presently be described. The plate 9 may rest upon the flat inner end of the handle 4, or the same may be provided with guides 11 which are received in guideways 12 in the said handle 4, as illustrated in Fig. 4 of the drawing. The end wall, provided by the slot or opening 10 disposed adjacent the concaved threaded edge or face of the extension 6, is preferably arched or of a con- Vex formation, to be snugly received within the said concaved surface of the extension 6, and said plate, beyond the arched or round- 'ed edge, indicated for distinction by the numeral 13, is provided with a removable pin 14 which provides a shaft or trunnion for an adjusting worm or screw 15. The opposite end of the plate 9 is integrally formed forth in the following specication and falli' croL with ian voutwardly curved or arched tail piece 1G, and the end of the said tail is secured, as at 17 to the edge of the handle at, as clearly illustrated in the drawing.

The operation of the device may be briefly described as follows: When th-e j aw 5 is to be slid toward or away from the jaw 2, to

obtain a quick adjustment between the saidv jaws, a pressure by the ngerer thumb of the operator upon the arched shaped tail 1G causing the plate -9 to slide transversely ofthe "shank or' the handle 4 and thus movel the adjusting screw 15 out of engagement with'the'fthreads 8 upon the concaved face of -t'he angular `ezkzte'nsion 6 of the 5.

Then the jaws are properly adjusted, the pressiire upon the said tail 16 is released, and the tail, through its resiliency, will again slide the ,pllte 9 to itsvinitial position and v'so jbring the :threads of the adjusting sciews 15 into engagement with the threads 8 of the nenbers. The threads of the adjusting screw 15 are milled so that the said sc'i'eiv maybe readily revolved 'upon its sha ft 'letk to pei'init of va minute adjustment being obtained between the jaws 2 and as vifvell as to permit 'of Vthe jaw being' only a short distan'ce'iirorn an object engaged between the said jaws se as to arrange the j aivs in position to engage `With another object of va similarsize;

.5F-rein ythe `above "description, takeir in connect-ion n'ith'tl're accompanying drawing, the si pliity 'of the yIdeif'ie, as Well as the ad.-y vantags tliiereof lwill, itis thought, be perfetl'j'f apparent 'to those skilled in vthe. art to ivl--i'ch su'eh invention ap'pertains ivithont further detailed description.

`member Y for the movable Having thus describedthe invention, I claim 1. AIn a Wrenclnin combination, a stationary jaw having a shank, a handle secured to the shank, and a movable jaw slidable upon the shank, of an angularly extending jaw, said member contacting with one of the edges of the sha-nk and received in the handle, said member having its outer face threaded, a slidable plate straddling the 'shank and the eX- tension of the movable jaw, an adjusting screw upon the plate, and said plate having an arch-shaped resilient tailV piece secured to the handle adapted to normally torce the threads of the adjusting screw in enacting engagement with the threads 'of the ino'vable jaw extension.

In a wrench, in combination, a station ary jaiv having` a shank, a hai'idle for the shank and a. movable jax'v. `upon the shank, of an 4angular extensioii lfor Vthe l'nbvablejai'v contacting with one of the edges of the vshank and received in the handle, said angular eX` tension having its ontei` face c'o'ncafved and threaded, a slidable plate supported by the handle and strade-lling the shank and the last mentioned member, an adjusting screw journaled upon the plate, a resilient tail piece formed With the plate, said tail 'piece being arched and havinlp',` its end secured to the handle and normallyY sliding the -plate in Lone direction to bringthe threads of the adjusting screw into engagement with the threads of the extension or the movable jaW.

A'moin/ini) MA'cKiN.

Washington, 1);0. 

